$ git clone -n https://src.fedoraproject.org/rpms/eralchemy.git /var/lib/mock/f45-build-8215-378/root/chroot_tmpdir/scmroot/eralchemy
Cloning into '/var/lib/mock/f45-build-8215-378/root/chroot_tmpdir/scmroot/eralchemy'...
$ git fetch origin e8674fa8c998af06811acb66c3f024b6f8353fc9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/eralchemy
 * [new ref]         e8674fa8c998af06811acb66c3f024b6f8353fc9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e8674fa Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild